Given that they are necrophages, rotfiends feed on carrion and human corpses, but this does not mean they do not attack the living. They appear on battlefields, near cities afflicted by plague, or around villages touched by famine. See a rotfiend and you can be sure there are many more in the area. They appear of a sudden, and disappear even more quickly if threatened, so exterminating them is difficult. Trapping rotfiends makes little or no sense. Instead, they are best dealt with by cutting off their food supply, that is, burning all corpses in the area. Corpses must be incinerated rather than buried, for rotfiends are avid and skilful diggers. Without sustenance, the beasts will leave in search of new feeding grounds.